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Peter B. edited comment on IO-376 at 5/28/13 5:45 AM: ------------------------------------------------------ I got it solved by slightly modified solution described in: http://mohammed-technical.blogspot.de/2011/02/how-to-read-file-without-locking-in.html as the guy reads only byte by byte, where I read to buffer to speed up things up to RandomAccessFile.length(). Moreover as I already mentioned, similar functionality is already present in the: http://commons.apache.org/proper/commons-io/javadocs/api-2.4/org/apache/commons/io/input/Tailer.html so it should not be such a big deal. was (Author: typek_pb): I got it solved by slightly modified solution described in: http://mohammed-technical.blogspot.de/2011/02/how-to-read-file-without-locking-in.html as he reads only byte by byte, where I read to buffer to speed up things up to RandomAccessFile.length(). Moreover as I already mentioned, similar functionality is already present in the: http://commons.apache.org/proper/commons-io/javadocs/api-2.4/org/apache/commons/io/input/Tailer.html so it should not be such a big deal. > FileUtils.copyFile for the locked file (windows) > ------------------------------------------------ > > Key: IO-376 > URL: https://issues.apache.org/jira/browse/IO-376 > Project: Commons IO > Issue Type: New Feature > Components: Streams/Writers > Affects Versions: 2.4 > Environment: Windows > Reporter: Peter B. > Priority: Minor > > The use case: > - log4j writes to the file using RollingFileAppender. > - in parallel I need to read the file contents for later manipulation > (storing it's contents elsewhere) > Problem on windows: > - I open FileInputStream for reading from file > - when using IOUtils.copy(InputStream input, OutputStream output) exception > is thrown: > {code} > java.io.IOException: The process cannot access the file because another > process has locked a portion of the file > {code} > It would be great to have API enabling to copy contents of the locked file > (on windows) to OutputStream. > The method available in the API currently: > {code:java} > FileUtils.copyFile(File input, OutputStream output) > {code} > does the job, except for the files that are locked (in the windows > environment) as they're currently written to. > Some of the functionality is already in use in the: Tailer > However (non-bloked) copying full contents is not provided. > I'd need to retrieve a snapshot of the file. > Not sure about the right API, but generally I see 2 options: > - custom (File)InputSteam implementation or maybe > - custom FileUtils.copyFile(File input, OutputStream output) -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira